Parasitological, microbiological, and antimicrobial resistance profiles of raw and drinking water in a tourist city in the tri-border region of South America

Scherer, Gustavo Strieder; Leal, Diego Averaldo Guiguet; Greinert-Goulart, Juliane Araújo; Araújo, Ronalda Silva de; Beux, Márcia Regina; Moreira, Neide Martins

doi:10.2166/wh.2022.256

Cited by 5 publications

(3 citation statements)

References 19 publications

(23 reference statements)

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“…Previous studies in Latin America have found Cryptosporidium spp. in raw and drinking water [85][86][87][88] as well as outbreaks affecting immunocompetent and immunocompromised individuals [64]. Interaction of humans and animals has been growing and becoming closer in recent years increasing the potential for zoonotic transmission, and spread of pathogens such as Cryptosporidium spp.…”

Section: Plos Onementioning

confidence: 99%

Molecular diagnosis of intestinal protozoa in young adults and their pets in Colombia, South America

Potes-Morales

Crespo-Ortiz

2023

PLoS ONE

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Intestinal parasitic infections have been considered a relevant public health problem due to the increased incidence worldwide. In developing countries, diarrhea and gastrointestinal symptoms cause impaired work capacity in adults and delayed rate growth in children. Enteric infections of unknown etiology can often lead to misdiagnosis, increased transmission, and morbidity. The aim of this study was to determine the prevalence of intestinal parasites in a young adult population and their pets. Stool samples from 139 university students and 44 companion animals were subjected to microscopy diagnosis using wet mounts, concentration by zinc sulphate flotation and staining techniques (Kinyoun and trichrome stain). Molecular diagnosis of protozoa was also performed by conventional PCR. The mean age was 24 years, 54% individuals were female, 46% were men, and 66% had at least one pet. The overall prevalence for at least one parasite was 74.8% and the rate of polyparasitism was 37.5%. Eighty-three patients (59.7%) were positive for Blastocystis spp., followed by Cryptosporidium spp. 24.5%, Endolimax nana 13.6%, Entamoeba dispar/E. moshkovskii 7.8% and Giardia intestinalis 1.4%. Molecular diagnosis substantially improved Cryptosporidium spp. and Blastocystis spp. detection and allowed to distinguish E. histolytica from commensals in the Entamoeba complex. Student’s pets were also examined for parasitism. Samples from 27 dogs, 15 cats, one rabbit and one hen were analyzed, and parasites were detected in 30 (68.2%) as follows: Cryptosporidium spp. (24) Giardia spp. (4), hookworm (3), Endolimax nana (2) and Toxoplasma gondii (1). Overall, university students showed high prevalence of parasitism and polyparasitism suggesting exposure to parasite infected animals and contaminated environments. Cryptosporidium spp. was the predominant pathogen in human and domestic animals, and it was only detected by PCR, pointing out the need for sensitive tests in diagnosis and surveillance. Control strategies to prevent the effects of parasitic infections in young population should consider pets as reservoirs and transmission source.

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Section: Plos Onementioning

confidence: 99%

Molecular diagnosis of intestinal protozoa in young adults and their pets in Colombia, South America

Potes-Morales

Crespo-Ortiz

2023

PLoS ONE

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“…In Brazil, the membrane filtration technique is the most used alternative for the research analysis of Giardia spp. cysts in various water matrices (Rosado-García et al, 2017), being detected in raw and treated water from rivers (Scherer et al, 2022;Bonatti et al, 2023), treated sewage (Miglioli et al, 2017), marine and estuarine waters (Leal et al, 2018), and swimming pools (Pineda et al, 2020). However, this technique also presents limitations when used in highturbidity water samples (Coelho et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Dairy wastewater treatment employing microencapsulated Pseudomonas aeruginosa on low acyl gellan gum

Cuello,

Alcázar,

Castellanos

2024

Rev. ambiente água

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This study assessed the ability of Pseudomonas aeruginosa, microencapsulated in gellan gum, to decontaminate dairy wastewater and explored the potential reuse of microcapsules. P. aeruginosa was microencapsulated using the internal ionic gelation technique, employing low-acyl gellan gum as the wall material. The free and microencapsulated P. aeruginosa were inoculated into 150 mL of sterile wastewater and incubated in a shaking flask (150 rpm) at 30°C. Subsequently, the Baranyi Model was employed to calculate the growth parameters of P. aeruginosa. Concurrently, Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) were determined. The obtained results indicated that the microencapsulation process reduced the growth rate of the encapsulated microorganism. However, the microencapsulated bacteria achieved COD and BOD reduction percentages of 61.54% and 64.05%, respectively. Similarly, when reusing the microcapsules, removal percentages exceeding 57.00% were achieved. These findings could have significant implications for the industry in terms of reducing effluent contamination caused by substantial amounts of pollutants. Keywords: dairy wastewater, gellan gum, microencapsulation, Pseudomonas aeruginosa.

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“…A raíz de las distintas enfermedades ocasionadas por el consumo del agua (Peñafiel Cevallos, 2019), se fueron desarrollando técnicas de desinfección acordes a la tecnología existente durante la historia del ser humano, siendo el hervido una de las primeras técnicas en desarrollarse y actualmente empleada en distintas zonas del mundo, en mejora continua del primitivo proceso (Solano de la Sala et al, 2018). Debido a las enfermedades microbiológicas que surgían en las poblaciones abastecidas de agua (Cano et al, 2021;Scherer et al, 2022), los análisis del elemento significaron un punto de inflexión muy importante y cobraron una alta consideración, siendo a día de hoy un proceso clave en el proceso de abastecimiento de agua de consumo.…”

Section: Introductionunclassified

Estudio de la calidad del agua en los puntos de suministro al usuario del campus de la Universidad de Alicante

2023

Proceedings From the International Congress on Project Management and Engineering

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The protection of health and the prevention of water-related diseases is a major challenge for water supply systems. Disinfection ensures the effective elimination of any pathogenic organism that may be a source of waterborne diseases. Based on Royal Decree 902/2018, of 20 July, based on the WHO risk assessment methodology and from which the Water Health Plans are derived, and Royal Decree 140/2003, of 7 February, which establishes the health criteria for the quality of water for human consumption, the correct compliance with the Water Health Plan, recently implemented at the University of Alicante, is analysed through an extensive campaign of quality analysis at different points throughout the university. In addition, different agronomic indices are studied to determine its suitability as irrigation water. It is concluded that, despite the long period of disuse of the facilities caused by the pandemic and inactivity during the summer months, the water on campus has the minimum quality required, being suitable for human consumption and increasing the confidence of users in the quality of drinking water on campus.

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Parasitological, microbiological, and antimicrobial resistance profiles of raw and drinking water in a tourist city in the tri-border region of South America

Cited by 5 publications

References 19 publications

Molecular diagnosis of intestinal protozoa in young adults and their pets in Colombia, South America

Molecular diagnosis of intestinal protozoa in young adults and their pets in Colombia, South America

Dairy wastewater treatment employing microencapsulated Pseudomonas aeruginosa on low acyl gellan gum

Estudio de la calidad del agua en los puntos de suministro al usuario del campus de la Universidad de Alicante

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